The problem is this team is missing a franchise piece like a Chris Bosh (Derozan is definitely a tier below a Bosh-caliber talent).

I disagree. Bosh was good here but never a franchise player. Also, I am not so sure that DD is a tier below Bosh. Around the league you have the LBJs the Wades, the KDs and George is getting there as well, and then you have the rest, all-stars even but not in the same level, but how many LBJ and KDs this league has? Not too many.